package org.zxp.designpattern.observer.java;

/**
 * @program: effectiveJava
 * @description:
 * @author: X-Pacific zhang
 * @create: 2019-08-29 11:27
 **/
public class Watcher1 implements Watcher {
    @Override
    public void update() {
        System.out.println("Watcher1被通知");
    }
}
